h3 {
    color: red;
    font-size: 50px;
}

.react {
    width: 200px;
    height: 200px;
    float: left;
    margin-right: 20px;
    background: url('../images/react.png');
    background-size: cover;
}

.vue {
    width: 200px;
    height: 200px;
    float: left;
    background: url('../images/vue.png');
    background-size: cover;
}